Mill for rolling metal



2 Sheets-Sheet 2 (No ModeL); i

V 0. G. HALL. MILL- FOR ROLLING METAL.

' No. 542,016. PatentedJuly 2, 189 5.

STATES PATENT OFFICE.

ORLANDO CLIFFORD HALL, OF AUBURN, NEW YORK, ASSIGNOR TO CHARLES L. SHELDON, OF SAME PLACE.

MiLL FOR ROLLING METAL.

SPECIFICATION forming part of Letters Patent No. 542,016, dated July 2, 1895.

Application filed June 13, 1-392. Serial No. 436,556- (No model-l To all whom it may concern:

Be it known that I, ORLANDO CLIFFORD HALL, a citizen of the United States, and a resident of Auburn, Cayuga county, New York, have invented certain new and useful Improvements in Mills for Rolling Metals, of'

which the following is a specification.

In the manufacture of that class of axles known as fantail-axles that is, the beds of which are spread and reduced in thickness at the center, as also in the manufacture of certain other forms of axles and other articlesit is common to use mills having. two parallel rollers with dies formed upon or attached to them, said rollers being rotated or rocked, so as to secure the requisite movement for the passage of the bar that is formed into the axle or blank.

Heretofore in the manufacture of axles it has been common to provide the dies with grooves which practically conform to the shape of the part of the bar which is operated upon, which necessitates the use of expensive appliances, the dies themselves costing a great deal, requiring nice fitting and adjustment and being liable to break and being expensive to repair.

The object of my invention is to avoid the expense of dies corresponding in shape to the article to be rolled and to facilitate the operations of the mill and improve its construction, to which end I construct both the dies and the mill as set forth fully hereinafter and as illustrated in the accompanying drawings, in which- Figure 1 is a central elevation of a rollingmill having my improvements. Fig.2 is a side View of the rolls and dies, showing them in a different position from that shown in Fig. 1. Fig. 3 is an edge view of the parts shown in Fig. 2; and Fig. 4 is a perspective view of a fantaitaxle, such as can be rolled in the said mill. Figs. 5 and 6 are views illustrating the invention in connection with revolving rolls.

The frame and housing A of the mill may be of any suitable construction, and in this instance are combined with a bed B, which constitutes bearings for two shafts 1 2, provided with gear-wheels 3 4, driven in any suitable manner.

In the bearings in the housing lit the axles or journals of two rolls B 0, each of which carries the dies that cooperate with those of the other roll.

The dies may be secured to the rolls or they may be formed of the same, as illustrated in the drawings, in which each roll has eccentric die-faces 7 8, the center a: of the die-face 7 being upon one side of the center of the roll and the center y of the die-face 8 upon the opposite side of the center of the roll.

The form or curvature of thedie-faces 7 is such that when the centers of said pair of said faces are opposite each other in the vertical plane of the axis of the rolls,as shown in Fig. 2, the space or pass between will be greater in height than when the other portions of the faces are brought opposite each other, so that the swinging or turning of the rolls in either direction will bring the faces 7 7 closer together. As a result of this construction, if a blank of the form illustrated in dotted lines, Fig. 2, is introduced sidewise between the the said dies and in contact therewith about midway of its center, and if the rolls are then rocked in either direction, the result will be to roll down one end of the bar, elongating it and reducing it in height, as illustrated in full lines, Fig. 2. After one end is thus rolled down the blank is reversed and the other end is rolled down in like manner. Thus the requisite taper is imparted to the bar or blank in one direction. It is now necessary to taper the blank from the end toward the center, so that it will be thickest in the other direction at the ends and thinner toward the center. For this reason the pair of die-faces 8 are closer together when their centers are on said plane of the axes of their rolls and the rolls are in the position shown in Fig. 2 than when said rolls are in any other position. It is therefore necessary, in order to taper the bar in the opposite direction, to turn the rolls to the position shown in Fig. 1, when the die-faces will be farther apart than when the said rolls are in any other position, and then one end of the bar, as shown in full lines, is introduced into the pass between the said faces and the rolls are rocked in the direction ofthe arrow, Fig. 1, when the bar will be somewhat elongated and gradually tapered ICO imparted to the same, the result of theoper ation between the two dies imparting to the bar the fan-shaped form illustrated in perspective in Fig. 4.

It will be evident that by properly forming the die-faces the bar may be rolled to other shapes than that illustrated, but that in any case the pass of each die is open at the side and the working face extends to said side, so

that the bar or blank can be introduced from one side to enter said pass, and that then, by the rotation or rocking of the roll, the requisite effect is produced without the necessity of making the passes conformv to the exact shape of the article to be rolled.

Any desired means maybe employed for imparting the movement to the rolls.

It will be evident that each. roll or die may haveany desired number of die-faces of different degrees of eccentricity and different shapes, according to the shapeand character of the article to beformed. Thus Figs. 5 and 6 illustrate rolls in which the face 7 is at one side of each roll and the face 8 atv theother, the rolls being revolved and the action being essentially the same as before.

Instead of rolling first onehalf and then the other, the whole length of the bar may be rolled first on one edge and then on the other, or the blank may be inserted between the rolls when the sides 7 7 are opposite, as in Fig. 5. One half-turn of the rolls shapes the sides of the blank to the form shown at X. The blank is then pulled quickly back in the direction of the arrow and turned one-quarter over and passed between the faces 8 8 when farther separated and then rolled to the form shown of Y, Fig. 6.

Without limiting myself to the precise construction and arrangements of parts described and shown, I claim- In a mill for rolling bars that are spread or widened in one direction and reduced in thickness in the other direction toward the center, the combination of the two roll dies each having two eccentric die faces, as described, one pair of die faces formed to approach as the centers thereof are brought to the vertical plane of the axis of the rolls, and the other pair being formed to approach as their centers are carried to either side from said plane, said dies being open at and extending to the side of the roll for the introduction of the bar or blank, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ORLANDO CLIFFORD HALL.

\Vitnesses:

R. R. KEELER, CHAS. F. STUPP. 

